changed creditors from ArrayList to HashSet
changed creditors from ArrayList to HashSet

pruivo/JGroups,vjuranek/JGroups,kedzie/JGroups,pferraro/JGroups,danberindei/JGroups,deepnarsay/JGroups,TarantulaTechnology/JGroups,rpelisse/JGroups,belaban/JGroups,rvansa/JGroups,pferraro/JGroups,dimbleby/JGroups,danberindei/JGroups,slaskawi/JGroups,TarantulaTechnology/JGroups,dimbleby/JGroups,belaban/JGroups,Sanne/JGroups,tristantarrant/JGroups,pferraro/JGroups,vjuranek/JGroups,ibrahimshbat/JGroups,ligzy/JGroups,rpelisse/JGroups,rhusar/JGroups,danberindei/JGroups,ibrahimshbat/JGroups,TarantulaTechnology/JGroups,rpelisse/JGroups,tristantarrant/JGroups,pruivo/JGroups,belaban/JGroups,rhusar/JGroups,Sanne/JGroups,ibrahimshbat/JGroups,ibrahimshbat/JGroups,pruivo/JGroups,slaskawi/JGroups,Sanne/JGroups,kedzie/JGroups,kedzie/JGroups,ligzy/JGroups,deepnarsay/JGroups,rvansa/JGroups,dimbleby/JGroups,ligzy/JGroups,vjuranek/JGroups,slaskawi/JGroups,deepnarsay/JGroups,rhusar/JGroups